Tube-compressor.



No. 715,429. Patented ngc. 9,1902.

a. .1. sSAaunv. TUBE com'PaEsso.'

Application med Apr, s, 1902.)v

(No Medel.)

UNITED STATES PATENT OFFICE.

GEORGE J. SEABURY, or NEW YORK, N. Y..

TUBE-COMPRESSOR.

SPECIFICATION forming part of Letters Patent No. 715,429, dated December9, 1902. Application tiled April 9, 1902. Serial No. 102.055. (Nomodel.)

To @ZZ whom, it muy con/cern:

Be it known that l, GEORGE J. SEABURY, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Tube-Compressors,of which the following is a specification, reference being had thereinto the accompanying drawings.

The present invention relates to tube-compressors as they are known inthe art, such devices being used for compressing or pinching flexiblehose or tubing to control the flow therethrough.

The Object of the invention is to provide a simple, cheap, effective,and small compressor particularly adapted and intended for use withfountain-syringes, although it will be apparent that it may be used withcompressible tubing other than syringe-tubing, if desired. It isessential that compressors of this character be simple in construction,so as to be easily manipulated and not likely to get out of order; thatthey be cheap, so as not to add materially to the cost of the outfit;that they be sure and effective in operation to the end that the iiowthrough the tubing may be properly controlled, and, furthermore, thatthe construction and operation be such as to minimize the wear andabrasion on the tubing, and, iinally, that they be of as small andcompact a construction as is compatible with efficiency to permit oftheir ready packing with the rest of the outfit.

In the drawings which form a part of this specification I haveillustrated one embodiment of my invention, showing the same inconnection with a section of syringe-tubing.

In said drawings, Figure 1 is a central longitudinal sectional view ofthe compressor in clamping position, the compression member of thedevice Vbeing shown in its two extreme positions in full and in dottedlines. Fig. 2 is an end view of the compressor, showing a compressedtube in section. Fig. 3 is a detail perspective view showing theseparated parts of the compression member of the device and theoperating-screw.

Referring to the drawings by numerals,like parts being designated bylikenumerals in the several views, 1 indicates a short section of metallicpipe or cylinder which forms the encircling member ot' the compressorthrough which the flexible tubing 2 passes. Such encircling member 1will be of somewhat larger diameter than that of the tubing 2, so thatit may be moved freely thereon. Threaded in the wall of said member 1 isa screw 3, having a milled vhead 4 at its outer end to permit its readymanipulation. At its inner end the said screw 3 carries the compressionmember 5 of the device, said compression member being a section of asphere which has a universal rocking and swiveling connection with thescrew 3, the rocking connection permitting it to seat itself accuratelywhen forced down against the tube 2, while the swiveling connectionallows rotation of the member 5 and screw 3 relative to each other. Thesaid compression member 5 is cast on the same arc as the cylindricalsection l, so that it fits closely the interior of said section 1 andclamps the tubing 2 eqn ally at all points when in its lower clampingposition, as shown in Fig. 2, thus insuring an absolutely duid-tightcompression, the free rocking movement of this compression member 5 onthe screw 3 permitting its close and accurate seating against the tubing2.

It will be observed that the spherical section which forms thecompression member 5 admits of the use of a comparatively smallencircling member 1, for the reason that the said member when raised toits upper position (see dotted lines, Figs. 1 and 2) maybe drawn closelyup and abut against the curved inner surface of the member 1 and permitfull expansion of the tubing 2, the upper surface of the member 5 beingpreferably slightly curved to allow it to tit snugly against theinterior of the pipe-section 1. It is obvious also that the compressionmember 5 moves upon the tubing 2 with a direct thrust and does not dragor roll thereon, so that abrasion or breaking of thin tubing fromcontinued use is obviated, this result being further promoted by reasonof the swiveled connection between the screw 3 and the compressionmember 5, which permits the freerotation of the screw 3 relative to themember 5 so soon as said member 5 takes hold of the tubing 2, therebyrelieving the tubing of the rubbing which would occur if the memberrotated with the screw.

ILO

It will be seen that by using a compression member 5 which is a sectionof a true sphere any swiveling rotation of said member 5 upon the screw3 relative to the tubing 2 will not affect its clamping action on thesaid tubing 2, so that it cannot become displaced and fail in itsclamping action, as would be the case if it were elliptical or hadunequal axes.

While the swiveling and rocking connection between the member 5 and thescrew 3 may be made in various'ways, the construction shown in thedrawings by which such connection is made is found to be a verysatisfactory one; In this construction (see Fig. 8) a section 6 of aspherical shell receives the head 7 at the inner end of the screw 3, anda slotted cap plate or disk 8, the upper surface of which is curved, isthen slipped over the head 7, so as to inclose and lock it within thecavity of the section 6. Said disk 8 is then secured by soldering,brazing, or in any suitable manner to the section 6, and a swivelingrocking connection between the parts is made.

Having thus described my invention, I claim and desire to secure byLetters Patentl. A tube-compressor comprising a tubeencircling member,having a cylindrical bore, and a tube-compression member formed of asection of a sphere, means for adjusting said compression member and arocking connection between the latter and its adjusting dev1ce.

2. A tube-compressor comprising a tubeencircling member formed of asection of a cylinder, a tube-com pression member formed of a section ofa sphere, an actuating-screw for said compression member, and a rockingconnection between said screw and compression member.

3. A tube-compressor comprising a tubeencircling member formed of asection of a cylinder ,a tube-compression member formed of a section ofa sphere, an actuating-screw for said compression member, and a rockingand swiveling connection between said screw and compression member.

4. A tube-compressor comprising a cylindrical tube-encircling member, anactuatingscrew mounted therein and having a head at its inner end, acompression member formed of a section of a spherical shell to receivethe inner head of said actuating-screw, and which latter has a rockingconnection with said compression member, and means forlockin g saidscrew-head within said shell-section.

5. A tube-compressor comprising a cylindrical tube-encircling member, acompression member formed of a section of a spherical shell to receivethe innerl headed end of an actuating-screw, and which inner headed endaffords a rocking connection between said screw and said compressionmembers, and a slotted cap-plate secured to said section to lock saidscrew and spherical shell-section together.

6. A tube-compressor comprising a cylindrical tube-encircling member, acompression member formed of a section of a spherical shell to receivethe inner headed end of an actuating-screw, and a slotted cap-platesecured to said section to lock said screw and spherical shellsectiontogether, said capplate having a curved upper surface to abut againstthe curved inner surface of said cylindrical tube-encircling member.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE J. SEABURY.

Witnesses:

HENRY CALVER, Guo. W. REA.

